First off I want to say hello from Idaho! Our house has no backup heat source such as a wood burner or even a gas stove so I decided to do something just in case we lose power during one of our cold Idaho winters. I purchased a Westinghouse 7000 watt generator for just powering a few circuits for heat and a little electricity. My house has a main panel in the garage with most of the circuits I would want to power such as my fridge and a few lights and receptacles. I have a 125 amp sub-panel down stairs that feeds of the main in the garage and the only item I want to power downstairs is my furnace. My question is with a Reliance 30 amp 7500 watt 6 circuit transfer switch could I turn off all the breakers in my sub-panel downstairs except for the furnace and run it through the 125 amp breaker in my main panel in the garage? I already have the transfer switch but haven't mounted it I got it for a very good price that's why I went with it and figured 6 circuits will do me. Thanks for and help.